Lethaia

How to Cite

BERGSTRÖM, S. M., CHEN, X., GUTIÉRREZ-MARCO, J. C. and DRONOV, A. (2009), The new chronostratigraphic classification of the Ordovician System and its relations to major regional series and stages and to δ13C chemostratigraphy. Lethaia, 42: 97–107. doi: 10.1111/j.1502-3931.2008.00136.x